Device for grinding valves or the like



June 24, 1930-.

A. RIEGEL DEVICE FOR GRINDING VALVESOR THE LIKE Filed A rii 22, 1929 I/I/AI/ V//////////// INVENTO i TTORNEY Patented June 24, 1930 TET AUSTIN RIEGEL, 0F HAYWARD, CALIFORNIA DEVICE FOR GRINDING VALVES OR THE LIKE Application filed April 22,

This invention relates to an improved manually operated device for grinding valves or the like.

An object of my invention is to provide a novel device for grinding valves or the like.

A further object of my invention is to provide an improved valve grinding device wherein a shaft carrying a valve grinding member may be rotated first in one direction and then in the opposite direction by one and the same operation.

A still further object of my invention is to provide a manually operated valve grinder which enables a grinding member to be alternately rotated to the left and then to the right by pressure being exerted only in one direction.

Another object of my invention is to pro vide a valve grinder of novel construction wherein is provided a spring pressed shaft carrying a grinding member which is automatically rotated in one direction and then in the opposite direction by the tension of a compressed spring.

In th accompanying drawing the figure illustrates a valve grinding device constructed in accordance with my invention, showing a part thereof in vertical crosssection.

Referring to the drawings, the numeral 1 represents a tube having a handle 2 attached to and extending over one of its ends. Slidably located in the tube with a part thereof projecting therefrom, is a shaft 3 having a steel ball 5 movably imbedded in one of its ends and a metallic block or grinding member 41: secured as by a pin to its opposite end. Movably located inside the tube with its lower surface contacting with the steel ball 5 is a spring supporting disc 5, above which is located a spiral spring 6. The ends of the spring 6 contact respectively with the handle 2 and the spring supporting member 5. The upper part of the shaft 3 is provided with a pair of left hand spiral grooves 6 which are located on opposite sides of the shaft and extend downwardly from a point adjacent the shafts upper end to the points designated by A on the drawings. The lower part of the shaft 3 is provided with a 1929. Serial No. 357,063.

pair of right hand spiral grooves 7 which are located on opposite sides of the said shaft and extend upwardly from a point adjacent the shafts lower end to the points designated by B on the drawing, where they intercept the spiral grooves 6. The left hand spiral grooves 6 intercept the right hand spiral grooves 7 at the points A. Ad justably screwed into the'lower end of the tube 1 at opposite sides thereof are a pair of projecting members or screws 8, the inwardly projecting ends of which are slidably located in the spiral grooves 6.

When the device is to be operated, the grinding member 4 is placed in a proper contacting position with a valve seat or other surface to be ground away, and the handle 2 is manually pressed downwardly without turning. As the handle and tube are actuated in a downward direction the pins 8 are carried with them, thereby contacting with the lateral sides of the spiral grooves 6. The movement of the pins 8 against the sides of the spiral grooves 6 cause the shaft 3 and the grinding member 4 to turn in a left hand direction until the pins reach the points A. At the points A the pins intercept the spiral grooves 7 and thereafter follow the same to the lower ends of the latter. After the pins enter the grooves 7 at the point A, the pins contact with the sides of the said grooves '7, thereby causing the shaft 3 and the grinding member 4 to turn in the opposite or right hand direction.

During the downward movement of the handle the shaft 3 has moved upwardly inside the tube 1, thereby compressing the spiral spring 6. When the pressure on the handle is released the spiral spring exerts an upward force on the handle 2, thereby causing the handle and the tube to move away from the grinding member 4. As the tube is moved in an upward direction, the pins 8 travel inside the grooves 7 to the points B, thereby causing the shaft and the grinding member to turn in a left hand direction. During the upward movement of the tube the pins again enter the grooves 6 at the points B and cause Isis,

the shaft and grinding member to turn in a right hand direction.

By means of my invention I have provided an improved device for grinding or smoothing surfaces which permits a grinding member to be automatically rotated in a plurality of directions by one and the same operation. It is apparent that my improved grinding device may be constructed in other forms with the grooves located at different pitches and theioperatingmeans varied, so for this and other apparent reasons I desire my invention included broadly Within the spirit of the appended claims.

Having described my invention, What I claim is:

1. A grinding device comprising a tube, a shaft movably located in the tube having a plurality of right hand spiral grooves and a plurality of left hand spiral grooves therein; the said left hand spiral grooves intercepting the right hand spiral grooves at points apart from the points where the right hand grooves intercept the left hand spiral grooves, and slidable means carried by the tube and located inside the grooves.

2. A valve grinding device comprising a tube, a shaft movably located in the tube having a plurality of right handspiral grooves and a plurality of left hand spiral grooves therein, the said left hand spiral grooves intercepting the right handspiral grooves at points apart from the points Where the right hand spiral grooves intercept the left hand spiral grooves, slidable means carried by the tube and located. in the grooves, and a spring located in the tube for automatically returning the shaft to its normal position.

In testimony whereof I aflix my signature.

AUSTIN RIEGEL. 

